Hi there. Yes, you can definitely do that. You can set your hub so that anyone can join, but only Experts can ask questions. You could, for example, add a banner or a link in the side bar to your PayPal account which instructs members to pay your fee to post a question. When a member pays, you would receive notification from PayPal, and could then upgrade that member to and Expert from the moderation panel in your hub, and they could then start asking questions.

Here's what you'd have to do :
- Log into your hub and go to Settings > Moderation Settings > Moderation Controls and select Expert Only.
- Next, create and log in to a PayPal account if you don't already have one, and go to Profile > My Selling Tools > Selling Online > PayPal buttons > Update > Create New Button within that PayPal account. Here you can create the PayPal "Buy Now" button button that your hub visitors will click on to pay you for your answers.
- When you have created your Buy Now button, including the fee you'd like to charge for answering visitors questions, you will be presented with a block of code for that button.
- Log into your hub and go to Settings > Advanced > Custom Ads and copy & paste your PayPal button code into Adblock 03 and click on Submit. Your Buy Now button will now appear in the side bar of your hub.
- In your hub, now go to Settings > Customization > Site Details > About and add some text in the box there like "Ask Dr. Julia any question, then click on the Buy Now button below to purchase a professional answer from her for only $5". This text will appear above your Buy Now button in your hub's side bar.
And that's it!
Now a visitor can come to your hub, ask a question, click on the Buy Now button, pay your professional fee, and you will receive a notification from PayPal including the customer's email address. You can then answer the customer's question in your hub for other visitors to see, or via email if privacy is a concern.by Robert Millar 5 years ago

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Is it possible to build a paid Q/A site using Qhub, where users need to pay to ask questions?